Clock



FIG. 1 is a top, front, right perspective view of a clock in accordance with my design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a rear elevational view thereof.

The broken lines showing portions of the clock are included for the purpose of illustrating portions of the article and form no part of the claimed design. 

CLAIM The ornamental design for a clock, as shown and described. 